Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2007-03-07
2008-12-09
Ha, Dac V (Department: 2611)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S138000, C370S436000, C370S437000, C370S468000, C455S452100
Reexamination Certificate
active
07463669
ABSTRACT:
Methods and apparatus for allocating tones for communications purposes in adjoining cells of an OFDM system are described. Tones used in each cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function. Different cells use different tone to tone hopping sequence allocation functions to minimize the number of collisions between hopping sequences of neighboring cells. Tone hopping sequence to communications channel allocation functions are used to allocate tone hopping sequences to communications channels. Communications channels are used by wireless terminals, e.g., mobile nodes, to transmit data. Over time, a wireless terminal uses the tones included in the tone hopping sequences corresponding to communications channels it is authorized to use. Accordingly, tones are assigned to communications devices by a multi-function, e.g., two level, mapping operation.
REFERENCES:
patent: 5263047 (1993-11-01), Kotzin et al.
patent: 5410538 (1995-04-01), Roche et al.
patent: 5859841 (1999-01-01), Gitlits
patent: 5867478 (1999-02-01), Baum et al.
patent: 5946624 (1999-08-01), Petranovich et al.
patent: 6018317 (2000-01-01), Dogan et al.
patent: 6131016 (2000-10-01), Greenstein et al.
patent: 6246713 (2001-06-01), Mattisson
patent: 6282185 (2001-08-01), Hakkinen et al.
patent: 6298081 (2001-10-01), Almgren et al.
patent: 6317412 (2001-11-01), Natali et al.
patent: 6473418 (2002-10-01), Laroia et al.
patent: 6507568 (2003-01-01), Kumar et al.
patent: 2298360 (2000-11-01), None
patent: 97026742 (1997-07-01), None
Fazel, K. et al.: “A flexible and High Performance Cellular Mobile Communications System Based on Orthogonal MultiCarrier SSMA” Wireless Personal Communications, Kluwer Academic Publishers, NL, Vo. 2, No. 1/2, 1995, pp. 121-144.
Gernandez-Getino Garcia et al: “Efficient Pilot Patterns for Channel Estimation in OFDM System Over HF Channels”, IEEE VTS 50th Vehicular Tech. Conf. Gateway to the 21st, Century Comm. Village, Amsterdam, 9/19/99, vol. 2, Conf 50, pp. 693-697.
Han, D. S., et al: On the Synchronization of MC-CDMA System for Indoor Wireless Communications:, VTC 1999-Fall, IEEE VTS 50th, Vehicular Tech. Conf; Gateway to the 21st Century Comm. Village, Amsterdam, Sep. 19-22, 1999 vol. 2, Conf. 50 Sep. 1999 pp. 693-697.
Reimers, U. “Digital Video Broadcasting”, IEEE Communications Magazine, IEEE Service Center, Piscataway, NJ, US vol. 36. No. 6, Jun. 1, 1998, pp. 104-110.
Timor Uzi: “Multitone Frequency-Hopped MFSK System for Mobile Radio”, Dec. 1982, The Bell System Technical Journal, vol. 61, No. 10. pp. 3007-3017.
Tufvesson et al: “Pilot Assisted Channel Estimation for OFDM in Mobile Cellular Systems”, 1997 IEEE 47th Vehicular Technology Conference, New York, vol. 3, Conf 4 May 4, 1997 pp. 1639-1643.
Wang C. C. et al: “Dynamic Channel Resource Allocation in Frequency Hopped Wireless Communication System”, Information Theory, 1994, Proceedings, 1994 IEEE International Symposium on Trondheim, Norway 27, Jun. 1-Jul. 7, 1994, NY Jun. 29, 1994 p. 229.
International Search Report PCT/02/019273, International Search Authority, United States, Oct. 29, 2002.
Li Junyi
Parizhsky Vladimir
Ha Dac V
O'Hare James K.
QUALCOMM Incorporated
Rouse Thomas R.
Vu Kenneth K.
LandOfFree
Method of tone allocation for tone hopping sequences does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of tone allocation for tone hopping sequences, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of tone allocation for tone hopping sequences will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4049456